suitable for motorway use? I'm trying to be responsible by choosing a smaller bike as a first venture into motorcycling. The ninja 250r looks appealing but I'm slightly concerned that the bike won't have enough grunt to ride comfortably at motorway speeds. I'm in the UK - so 70mph, though it would also be nice to know the bike's good for 80-90mph. I ride about 20 motorway miles each way to work. Anyone out there with one who regularly rides the motorway?